供应Ultradur PBT B4300M5矿物增强耐水解PBT ¥22.00 供应Ultradur PBT B4315G6HR玻璃纤维增强耐水解PBT ¥22.00 供应Ultradur PBT B4330G3HR玻璃纤维增强耐水解PBT ¥22.00 供应Ultradur PBT B4330G6HR玻璃纤维增强耐水解PBT ¥22.00 供应Ultradur PBT B4406G2玻璃纤维增强阻燃PBT ¥22.00 供应Ultradur PBT B4406G3玻璃纤维增强阻燃PBT ¥22.00